国家冰川冻土沙漠科学数据中心

元数据

名称	The effect of thermochemical sulfate reduction of n-pentane and condensate on the chemical and isotopic compositions of gases: implications for the organic reactant and reaction extent
科技资源标识	CSTR:11738.14.NCDC.XDA14.PP4470.2024
DOI	10.1016/j.marpetgeo.2022.105916
数据共享方式	开放下载
摘要	Evaluating the composition of organic reactants initially involved in thermochemical sulfate reduction (TSR) reaction and better understanding the chemical and isotopic compositions of gases are helpful to minimize the risks involved in exploration of natural sour gas reservoirs. Variations in the chemical and carbon isotopic compositions of the gas produced during high pressure (50Mpa), isothermal (360 ◦C) hydro-pyrolysis experi_x0002_ments of the TSR reaction and thermal cracking involving n-pentane (n-C5) and condensate were investigated using a high-pressure gold tube system. The results show that the yields of CH4, CO2 and H2S increased with reaction time, and that the yields of C2–C4 firstly increased and then decreased. The δ13C value of alkane gases increased with reaction time. The δ13C value of CO2 produced from the TSR reaction involving n-C5 became less negative. The yields of alkane gas, CO2 and H2S from the TSR reaction of n-C5 were up to two times higher than that those from the TSR reaction of condensate. This indicates that lighter liquid hydrocarbons with higher hydrogen content produce more hydrocarbon and non-hydrocarbon gases. The relationship between the dryness, δ13C values of alkane gases and sourness could help to estimate whether the organic reactant was liquid or gaseous hydrocarbons. The value of ln(C2/C3) at the early stage of TSR reaction can be used to roughly estimate the composition of the liquid hydrocarbons involved in the TSR reaction. Our analysis also shows that the value of ln(C2/C3) firstly increased and then decreased with increasing gas dryness during the TSR reaction, which could be an effective index to assess the TSR reaction extent and provide new clues for identifying gas origin. The δ13C values of methane and ethane produced in the TSR reaction involving n-C5 reversed to δ13C1 > δ13C2 during the 48–60h period, which could be related to the oxidation of alkanes by HSO4 − . This could help explain the δ13C1 > δ13C2 in TSR influenced gas reservoirs with low H2S content
学科分类	170.50
关键词	Carbon isotopes Condensate Gaseous hydrocarbon N-pentane Thermochemical sulfate reduction
作者	Huijuan Guo
数据量	16.3 MiB
论文类型：	journal
论文网址：	https://doi.org/10.1016/j.marpetgeo.2022.105916
期刊名称：	Marine and Petroleum Geology
出版时间：	2022-11-01

引用和标注

数据引用

Huijuan Guo. The effect of thermochemical sulfate reduction of n-pentane and condensate on the chemical and isotopic compositions of gases: implications for the organic reactant and reaction extent. 国家冰川冻土沙漠科学数据中心(http://www.ncdc.ac.cn), 2024. https://cstr.cn/CSTR:11738.14.NCDC.XDA14.PP4470.2024.

许可协议

本作品采用知识共享署名 4.0 国际许可协议进行许可。

扫码后在手机端浏览

项目信息详情

项目名称：深层油气形成与分布预测
项目编号：XDA14010000
项目类别：中国科学院战略性先导科技专项（A类）